86571034787779 has 4 divisors (see below), whose sum is σ = 88910792484784. Its totient is φ = 84231277090776.

The previous prime is 86571034787759. The next prime is 86571034787807. The reversal of 86571034787779 is 97778743017568.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86571034787779 - 2⁷ = 86571034787651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86571034787699 and 86571034787708.

It is not an unprimeable number, because it can be changed into a prime (86571034787729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1169878848447 + ... + 1169878848520.

It is an arithmetic number, because the mean of its divisors is an integer number (22227698121196).

Almost surely, 2^{86571034787779} is an apocalyptic number.

86571034787779 is a deficient number, since it is larger than the sum of its proper divisors (2339757697005).

86571034787779 is a wasteful number, since it uses less digits than its factorization.

86571034787779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339757697004.

The product of its (nonzero) digits is 3485099520, while the sum is 79.

The spelling of 86571034787779 in words is "eighty-six trillion, five hundred seventy-one billion, thirty-four million, seven hundred eighty-seven thousand, seven hundred seventy-nine".